This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation and storage of liquid crystal quartz watches. This standard applies to liquid crystal display watches with a nominal working voltage of DC1.5V or DC3.0V and basic functions such as hours, minutes, seconds and dates, including other liquid crystal display watches that are not worn on the hand. Liquid crystal quartz watch movements can also be used as a reference. QB/T 1902-2005 Liquid Crystal Quartz Watch QB/T1902-2005 Standard download decompression password: www.bzxz.net

ICS 39.040.10
Classification number: Y11
Registration number: 18402-2005
Light Industry Standard of the People's Republic of China
QB/T1902-2005
Recommended QH1902-1093
Liquid crystal quartz watch
Liyuid rrystal yuartz walrhes2005-07-26 Issued
National Development and Reform Commission of the People's Republic of China2006-01-01 Implementation
This standard is a revision of QB/11902-1993 ordinary liquid crystal quartz watch standard. The technical differences between this standard and QB/T1902-153 are as follows: - The technical parameters of the products are reasonably adjusted in the technical requirements (see Chapter 3); - The requirements for the appearance of products with a working voltage of 3.0V are added (3.2); - The requirements for the function of the product are added (Table A); - The reliability of use is described in detail in terms of appearance, and the requirements for the resistance of parts to external forces are added: - According to the product technical characteristics, the "anti-magnetic" performance requirements are eliminated, and the QB/T1902-2005 batch production characteristics are adjusted to avoid the oil sample sensitivity, and the number of samples for type testing is reduced (see Table 5); - The packaging, marking, transportation, storage, etc. of the products are reviewed in accordance with the new specifications of GB/T1.1-2000 and GB/T1.3-199 (see Table 6). |tt||This standard is in accordance with the normative requirements of Appendix A.
This standard was proposed by China Light Industry Federation. This standard was made by China National Clock and Watch Standardization Center. This standard was drafted by China National Clock and Watch Corporation and Light Industry Clock and Watch Research Institute. The authors of this standard are: Chen Zhendong, Zhang Xiaomei, Yi Jianmin, Bu Gusong, Ren Guangguang. The standards replaced by this standard are: GB6048-1985, GB6049-1985,
-QB/T1902—1993
From the date of implementation of this standard, it replaces the industrial standard QB/T1502-1993 issued by the former Ministry of Light Industry for semi-fluid quartz watches
Liquid crystal quartz watches
QB/T 1902 - 2005
This standard specifies the requirements, test methods, inspection and measurement, marking, packaging, transportation, storage, etc. of liquid crystal watches (hereinafter referred to as "flat watches").
This standard is applicable to liquid crystal watches with a nominal working voltage of DC1.5V or DC3.0V, and whose basic kinetic energy of hours, minutes and dates is 1.5V, including other liquid crystal display watches that are not regulated by law. Liquid crystal watch movements can also be used for reference. 2 Normative references
The clauses in the following documents become standard clauses through non-standard references. For non-dated references, all subsequent amendments (excluding errata) and revisions are not applicable to this standard. However, if the parties to this standard reach an agreement or discuss whether the latest version of this document can be used, the latest version of the undated reference is applicable to this standard. GDT2828.1 Sampling test procedures by attributes Part 1: Sampling by receiving quality (AOL) retrieved batch inspection sampling plan periodic inspection counting sampling procedures and tables (applicable to the inspection of production process stability) GE/T2829
GE/T4028
Inspection position mark of timing instrument
GE/T7168
QB/T1897
QB/T3747
QBT2389
3 Requirements
3.1 Working temperature Zinc-silver battery for clocks and watches. Anti-icing and anti-fingertip battery for clocks and watches. Carbon-carbon battery for clocks and watches. Potassium-potassium oxide battery for clocks and watches. The watch shall not be used within the range of 50℃, and the display shall be normal. 3.2 Working voltage The watch shall not stop working within the range of DC1.55V--DC1.25V or DC3.4V--IXC2.5V, and the display shall be normal. 3.3 Average instantaneous daily difference The average instantaneous daily difference of the watch shall meet the requirements of 1. Table 1 Items and indicators
Average time/(s/d)
Average temperature coefficient C,/Ls/(d.)]
Electrical coefficient.C/Ls/(d.]
Dynamic performance R/(s/d)
Battery history Replacement period L/a
Institute of Instruments
0.10~-D.10
0.4 --D.4
-2.0--2.0
0.15~-0.15
20~-20
·0.25·0.25
:2.0--2.0
-2.5~ 2.5
30 - 30
QB/T1902—2005
3.4 ​​Average temperature coefficient C..CbZxz.net
When the temperature changes from 23 to 8, the average instantaneous change of each ampere is: When the temperature changes from 23 to 38℃, the average instantaneous difference change of the average temperature is C, "G, and the temperature meets the requirements of the table. 3.b Pressure coefficient Cc
When the voltage drops from 10V to 25V, the voltage drops from 3.0V to DC2.SV, the change of the voltage is 1: The voltage coefficient C, or C.: C, or G, should be in accordance with Table 1 3.6 The replacement cycle of the battery and the replacement time of the battery should meet the requirements of Table 1. 3.7 The vibration performance R
of the battery should meet the requirements of Table 1. The vibration performance R
of the battery should meet the requirements of Table 1. The vibration performance R
of the battery should meet the requirements of Table 1. The vibration performance R
of the battery should meet the requirements of Table 1. The vibration performance R
of the battery should meet the requirements of Table 1. "Low" marked watch, pat dry, love the end speed of 3.3m/s, six learning and damage three external temptations, my silver shows the correct
3.9 Waterproof performance
The "waterproof" marked watch, its swimming performance should meet the standards of QBT1897. 3 Work resistance
The watch is subjected to full (40-1), scientific humidity 85%-% of the body filled with 24h full performance test, the test is not unexpectedly stopped, the product is normal after the fall.
3.11 Light resistance
For the same kind of wV 3.12 Reliability in use
3.12.1 The meter should not stop working under normal conditions: the liquid display should be normal, and all function keys of the meter should be normal. 3.12. During the absolute operation, the average time difference and temperature system integration test, the cumulative error should not exceed the requirements of Table 1. 3.12.3 The meter and the meter elements should be solid, and the meter should not fall off. For the meter, the meter and the meter will fall off after applying a static tensile force of 5N.
3. 13 Appearance 3.13.1 The surface should be clean and grease-free. There should be no obvious signs and symptoms. 3.13.2 The surface of the garment should be glassy and shrinkage-free. The cover and the micro-sound should be consistent with the clothing. The connection should be obvious. 3.13.3 The surface of the garment should be smooth and level. There should be no obvious spots, scratches, etc. 3.14 Additional functions 4 Test method 4.1 Test fittings 4. 1. Environment : The test temperature is 18-25 degrees Celsius, the fluctuation of the temperature is not more than ten degrees, and the temperature is gradually increasing. 4.2 Power supply Unless otherwise specified, the power supply voltage of the micro-test shall be 50V or 3.0V. The test is carried out on the same day as the six-dimensional rate specified in Table 4.1.1. 4.3 Instruments and equipment The resolution and maximum allowable error requirements of the test instrument are shown in Table 2. Table 2 Test instruments and equipment Test monitoring equipment The above equipment is a standard timer and a test position. 4.4 Test items 4.4.1 Operating temperature 3. usd [℃, relative humidity 1 year || | ... 15022006
t center.DSa/d
±, humidity
1=ug/min
Insulated in an environment with a temperature of 501) for 24h, the temperature is 4.1 after the product is installed within 2m of the product.1.Safely operate in a specified environment, keep the temperature after combustion at (0 ± 1) in an environment with a humidity of 2. Observe the display on the meter in this environment, (low steam can be used for the whole day to verify), the result should comply with 3.1.4.2. The working voltage
is based on the standard table 2: respectively move the actual power supply to PC1.55VDC1.25VDC3.4VDC2.5V for 1mn, observe the product status for other time periods, and comply with the provisions of 4.4.3. The average instantaneous daily difference
is maintained for at least 2h in the competition of the clothes Deng ten 23 one 1), and the instantaneous H difference of 3d is measured by m1, m, and m, and the investment method 1) is planned and standardized, and the production is in accordance with 3.3. = see + period, + shift
and a -3d average fat difference, qin tons seconds per day (3/call one is the 14th hour, the unit is shift (sm one is the 2u relative hour, the unit is seconds mother
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